Answer: Option (1) is the correct answer.
Explanation:
Oxygen, sulfur, selenium and tellurium are all group 8 elements. As we go gown the group there will be decrease in electronegativity of atoms.
Also, more is the electronegativity of an atom more it will attract the electrons towards itself. This will result in the formation of partial charges on the combining atoms. Thus, the molecule becomes polar.
Here, oxygen is the most electronargative out of the given options, so it will attract the electrons more towards itself. Hence, it will have the strongest hydrogen bonding at STP.
Answer:
Silicon, Si forms covalent-network solids.
Explanation:
Silicon, Boron and Carbon are the elements that form covalent networks solids: solid materials whose units consists of chains or networks of atoms or molecules covalently bonded together. Silicon, Si has a similar structure to carbon, but not the exact hardness because Si-Si bonds are not as strong as carbon-carbon bonds.
An example of Si covalent compound is silicon dioxide.
Answer:
Because the molecules of the mixture would be compact or bond together at room temperature. In this case, both gases will condense to form water (or ice, if the room temperature is prolonged) and such droplets of water will not cause a balloon to spontaneously explode at room temperature.
Explanation:
A mixture of hydrogen and oxygen will form water. Recall that the chemical formula for water is H₂O, where H represents Hydrogen and O represents Oxygen.
A balloon is a light (not thick) solid substance with a thin membrane when blown or filled with some elements or gases.
Room Temperature means cool or cold temperature. You already know that generally at room temperature, the molecules of any substance will stick together or will become less mobile (less spontaneous).
In this case, hydrogen gas and oxygen gas will go through a process called condensation - to form water - and then through the process called freezing - to form ice.
At room temperature, the gases will first change state (state of matter) from gaseous to liquid and then from liquid to solid.
This is why the balloon will NOT spontaneously explode.
Sodium hydroxide and hydrochloric acid can react with each other to form sodium chloride in the reaction HCl(aq)+NaOH(aq)→H₂O(l)+NaCl(aq).
I hope this helps. Let me know if anything is unclear.
Answer:
Hydrocarbon being non polar are soluble only in non polar solvent.
Explanation:
Hydrocarbon molecules either have very little polarity or they do not have polarity at all, this is because of absence of electro-negative atoms in their molecular structure. Due to this their solubility is also affected. The solubility of a compound depends on its polarity as it can dissolve in a polar solvent only when it is polar or else they are soluble in non-polar solvent